SU424163A1 - DEVICE FOR REPRODUCTION OF DELAY - Google Patents

Description

one

The present invention relates to information and measuring technology and can be used in automatic control and information processing systems.

Devices are known that implement the formation of a function with retarded arguments.

The disadvantages of the known devices are: significant hardware costs when it is necessary to obtain functions in parallel with different delay values, limiting the delay time by the saw voltage generator, low accuracy of setting the delay time due to the large number of comparison operations when the master voltage of the voltage is unstable.

The aim of the invention is to expand the range of the delay time of the input function and improve the accuracy of its implementation at the output of the device.

The proposed device is characterized in that a shift register, a pulse divider and a decoupler unit are inputted, the input of which is connected to the output of the sawtooth generator, and its output is connected to one key input, the other inputs of which are connected to the corresponding output of the shift register, one input which through a pulse divider is connected with

with exit

pulse generator, and another comparison circuit.

FIG. 1 shows a block diagram of a device for reproducing a lag; and in fig. 2 - diagrams of his work.

The device consists of a series-connected pulse generator 1, with a period of following its pulse G0; valve 2 controlled by trigger 3; frequency divider 4

with a division factor, where t -

g 1t

J a

the delay time of the input function Ux (f); shaper 5; of sawtooth voltage generator 6 with a repetition period of the drive and comparison circuit 7 comparing the input voltage Ux (i) with the input voltage .1 L / nm of the sawtooth generator

voltage 6. Memorization of the comparison result takes place in the shift register 8, the outputs 9 of which, together with the output of the decoupling unit 10, are connected respectively to the analog switches AND connected to the output of the device through the filters 12. The input of the decoupling unit 10 is connected to the output of the sawtooth generator 6. One of the inputs of the shift register 8 through the pulse frequency divider i3 is connected to the output of the pulse generator 1, and

its other input is with the output of the comparison circuit 7.

Works the proposed device as follows.

At the command “Start trigger 3 opens valve 2, which transmits pulses from pulse generator 1 to frequency divider 4

with a division factor Ni, as well as

 about

pulse frequency divider 13 with coeffit

dividing factor L2 where 7c is the time period (1

The output frequency of the pulse frequency divider 13. The pulses from frequency divider 4 through shaper 5 start a sawtooth generator 6, the output voltage of which (see Fig. 2a) is fed to a comparison circuit 7 and a decoupling unit 10. At the time of voltage comparison Ux (i) and psh (see Fig. 2a), the comparison circuit 7 generates pulses (see Fig. 25), which arrive at the input of the shift register 8 and are shifted in time by pulses from the pulse frequency divider 13 with a repetition period Tc. The pulses from the outputs 9 of the shift register 8 (see Fig. 2c) open the corresponding analog switch 11, from the output of which to the filter 12, the voltage from the isolating unit 10 (see Fig. 2d) returns for a time Tc. Thus, the input function is obtained, which is time-dependent by the time interval t.

In a similar way, functions delayed with respect to L / x (i) on pa 2m and 3m are formed (see Figs. 2e, 2).

Thus, the considered device makes it possible to obtain in parallel n functions delayed with respect to L / x (0 at time t, 2t, ..., t.

The change in t is made by adjusting the coefficient b of the frequency dividers 4 and 13, with a minimum value.

A further reduction of t can be accomplished by changing the sawtooth generator T

voltage 6 or the use of l - saw generators with sequential start

lump them through t ---. P

The rms error of the described method when obtaining the delay function is determined mainly by the capacity of the delay register and the comparison error

but,. L / U, (t) U, n

+

In bl where a is the angle of the saw.

Subject invention

A device for reproducing a lag containing a series-connected pulse generator, a trigger controlled valve, a frequency divider, a driver, a sawtooth generator, and a comparison circuit, as well as keys with output

filters, characterized in that, in order to expand the time lag range of the input function and improve the accuracy of its implementation, a shift register, a pulse divider and a decoupling unit, whose input is connected to the output of the sawtooth generator, and its output are connected to one the inputs of the keys, the other inputs of which are connected to the corresponding outputs of the shift register, one input of which is connected to the pulse generator through the pulse divider and the other to the output of the comparison circuit.

D

-Nnn

CH1b

, Start S1PvP

Umn

yx (t

±